In the quest for sustainable and portable energy solutions, a team of researchers led by Elias M. Salilih from the Purdue Polytechnic Institute at Purdue University has made a significant stride. Their work, published in the journal “Results in Applied Engineering,” introduces a novel design for a small-scale, portable solar tower that could revolutionize energy access in remote and disaster-stricken areas.
The innovation lies in the concentrator’s compact heliostat field, measuring just 2 meters by 5 meters. This compact size allows the entire system to be towed on public roads in a utility trailer, making it a versatile tool for off-grid rural communities or regions affected by natural disasters. “The portability of this system is a game-changer,” says Salilih. “It brings the promise of reliable, renewable energy to areas where it’s needed most.”
The solar concentrator comprises a receiver and a field of reflective heliostats arranged in a rectangular grid. The researchers analyzed two configurations: parabolic and flat side profiles of the heliostat field. Using a custom-developed computer algorithm, they optimized the placement of each heliostat to maximize efficiency for a given area. The algorithm also calculated various efficiency factors, including cosine efficiency, attenuation, shadowing, and blocking factors, leveraging concepts from computational geometry.
One of the study’s key findings is that the mean field efficiency of the different profiles is very similar, with the flat profile showing slightly better performance. “This suggests that simpler, flat configurations might be just as effective as more complex designs,” Salilih notes. The research focused on the mountainous region of Arequipa in southern Peru, but the analysis can be applied to other regions with available hourly solar radiation data.
The implications for the energy sector are profound. Portable solar towers like this could provide a reliable and sustainable energy source for remote communities, reducing dependence on fossil fuels and diesel generators. In disaster scenarios, they could offer a quick and efficient way to restore power. “This technology has the potential to transform energy access in underserved areas,” Salilih says. “It’s a step towards a more equitable and sustainable energy future.”
As the world continues to grapple with climate change and energy poverty, innovations like this portable solar tower offer a beacon of hope. By making renewable energy more accessible and adaptable, we can take significant strides towards a cleaner, more sustainable future. The research not only advances our understanding of solar energy systems but also paves the way for practical, real-world applications that can make a tangible difference in people’s lives.